
/*
 * OATH Token - HOTP/OATH one-time password token for iPhone
 *
 * Copyright 2010 Archie L. Cobbs <archie@dellroad.org>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * $Id: HOTP.h 2 2010-03-17 22:46:48Z archie.cobbs $
 */

#import <Foundation/Foundation.h>
#import <CommonCrypto/CommonHMAC.h>

@interface HOTP : NSObject {
    NSData *key;
    NSUInteger counter;
    int numDigits;
    NSString *dec;
    NSString *hex;
}

@property (nonatomic, retain) NSData *key;
@property (nonatomic) NSUInteger counter;
@property (nonatomic) int numDigits;
@property (nonatomic, retain) NSString *dec;
@property (nonatomic, retain) NSString *hex;

+ (HOTP *)hotpWithKey:(NSData *)key counter:(NSUInteger)counter numDigits:(int)digits;
- (void)computePassword;

@end

